Method and apparatus for patching operating systems

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G06F 944

Patent

active

056196989

ABSTRACT:
The present invention discloses a variety of methods and apparatus for providing patches within a computer operating system. A patch structure in accordance with one embodiment of the present invention includes a patch block which serves to link the patch structure into a patch chain, and a patch which contains the desired functionality of the patch structure. The patch chain includes a root patch structure and a final patch structure. The root patch structure has a root patch block and a given function which has the root functionality. One aspect of the present invention teaches a method for integrating patches into a computer operating system including the steps of obtaining a new patch to be associated with a patch chain for the given function, determining whether a patch chain is already created in the operating system for the given function and creating a root patch block pointing to the given function as the start of a new patch chain if a patch chain has not already been created for the given function, creating a new patch block for the new patch, and inserting data into the new patch block to cause the new patch block to point to the new patch.

REFERENCES:
patent: 5325532 (1994-06-01), Crosswy et al.
patent: 5335344 (1994-08-01), Hastings
patent: 5359730 (1994-10-01), Marron
patent: 5369770 (1994-11-01), Thomason et al.
patent: 5375241 (1994-12-01), Walsh
patent: 5446898 (1995-08-01), Bealkowski
patent: 5481713 (1996-01-01), Wetmore et al.
"Inside Macintosh: PowerPC System Software," Apple Computer, Inc., 1994, Addison-Wesley Publishing Company.

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